import json
from pathlib import Path
from typing import Dict, Any

from .lineage_resolver import resolve_lineage
from .grammar_hooks import summarize_lineage


def inspect_gx(path: str) -> str:
    try:
        gx_file = Path(path)

        if not gx_file.exists():
            return f"Error: File not found: {path}"

        data = gx_file.read_bytes()

        if len(data) < 8 or not data.startswith(b'XIC'):
            return "Error: Invalid .gx file (bad magic bytes)"

        version = data[3]
        manifest_len = int.from_bytes(data[4:8], 'big')

        if len(data) < 8 + manifest_len:
            return "Error: Incomplete .gx file"

        manifest_json = data[8:8 + manifest_len]
        manifest = json.loads(manifest_json.decode('utf-8'))

        entry = resolve_lineage(manifest)

        return summarize_lineage(entry)

    except json.JSONDecodeError as e:
        return f"Error: Invalid manifest JSON: {e}"
    except Exception as e:
        return f"Error: {e}"